CN215890860U - Special self-adjusting clutch for AMT (automated mechanical Transmission) automobile - Google Patents

Abstract

The utility model discloses a self-adjusting clutch special for an AMT (automated mechanical transmission) automobile, which belongs to the technical field of automobile parts and comprises a diaphragm spring, a main pressure plate, an inner driven plate, a middle pressure plate and an outer driven plate which are sequentially arranged in a shell, wherein a torque transmission assembly connected with the main pressure plate and the middle pressure plate is arranged on the periphery of the shell, the diaphragm spring is connected with the shell through a connecting assembly, and the inner side surface of the edge of the diaphragm spring is abutted against the outer end surface of an adjusting ring; an abrasion automatic compensation mechanism is arranged between the adjusting ring and the main pressure plate. The torque transmission capacity can be increased through the double-plate clutch, and the phenomena of vehicle shaking and the like caused by insufficient torque transmission capacity are avoided; the heat capacity of the clutch is increased by utilizing the two pressure plates, the abrasion thickness is allowed to be multiplied, and the service life of the clutch is prolonged; the automatic wear compensation mechanism can ensure that the distance between the diaphragm spring separation finger end and the flywheel is kept unchanged, the defect of inaccurate clutch position control is overcome, the AMT system control speed is improved, and the clutch and the gear shifting are stable and quick.

Description

Special self-adjusting clutch for AMT (automated mechanical Transmission) automobile

Technical Field

The utility model belongs to the technical field of automobile parts, and particularly relates to a self-adjusting clutch special for an AMT automobile.

Background

The existing AMT heavy truck clutch can meet the bottleneck when being matched with a higher-power engine, and mainly has the problems of insufficient torque transmission capacity for large torque, hill starting jitter and short service life, and is specifically shown in the following aspects:

1. the torque transmission capability of a matched high-power engine is insufficient, and starting jitter and slipping occur in the ramp ascending;

2. the clutch has poor heat dissipation performance, and when the temperature is high, the control system gives an alarm when the clutch is out of service, so that normal driving is delayed;

3. the friction plate has small allowable wear thickness and short service life.

The existing AMT clutch has the problems that the separation finger end changes along with the abrasion of a friction plate in the use process, the distance between the separation finger end of a push type clutch and the flywheel surface of an engine is increased, the distance between the separation finger end of a pull type clutch and the flywheel surface of the engine is decreased, and the combination position point of the clutch is difficult to control. Although the problems can be solved through an actuator sensor and control software, after the clutch is worn, the position of the clutch is still inaccurate to control due to the influence of factors such as the running gradient, the temperature, the expansion caused by heat and the contraction caused by cold of materials and the like, and the fault phenomena such as gear shifting delay and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a self-adjusting clutch special for an AMT (automated mechanical transmission) automobile, and aims to solve the technical problems that a high-power engine in the prior art is insufficient in torque transmission capability, has the phenomena of hill starting jitter and slipping and is short in service life.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

a self-adjusting clutch special for an AMT (automated mechanical transmission) automobile comprises a diaphragm spring, a main pressure plate, an inner driven plate, a middle pressure plate and an outer driven plate which are coaxially arranged in sequence, wherein friction plates are arranged on the inner side and the outer side of each of the outer driven plate and the inner driven plate, the outer driven plate is adjacent to an engine flywheel, and the diaphragm spring is adjacent to an input shaft of a transmission; the diaphragm spring, the main pressure plate, the inner driven plate, the middle pressure plate and the outer driven plate are all arranged in the shell, and the periphery of the shell is provided with a torque transmission assembly connected with the main pressure plate and the middle pressure plate and used for transmitting the torque borne by the shell to the main pressure plate and the middle pressure plate;

the diaphragm spring is connected with the shell through a connecting assembly, a plurality of separating finger ends of the diaphragm spring are radially and uniformly distributed, the inner side surface of the large end of the disc area of the diaphragm spring is abutted against the circular outer end surface of the adjusting ring, and the connecting assembly is arranged on the inner side of the adjusting ring and used for providing a self-adjusting fulcrum for the diaphragm spring;

the adjusting ring is sleeved outside the back surface of the friction plane of the main pressure plate, and a limiting structure matched with the inner end surface of the adjusting ring is arranged on the outer circular surface of the main pressure plate; the adjusting ring is connected with the main pressure plate through a tension spring assembly, and an abrasion automatic compensation mechanism is arranged between the adjusting ring and the main pressure plate.

Preferably, the shell comprises a cover and a connecting ring, the connecting ring is correspondingly arranged on one side of the outer driven disc, the cover is in clamping fit with the matching surface of the connecting ring, the cover and the connecting ring are fixedly connected through a connecting screw, and the other surface of the connecting ring is in coaxial clamping fit with the flywheel surface; a thickness calibration component for calibrating the total thickness of the main pressure plate, the inner driven plate, the middle pressure plate and the outer driven plate is arranged on the side wall of the cover; the torque transmission components are respectively and uniformly distributed between the cover and the main pressure plate and between the support ring and the middle pressure plate.

Preferably, the thickness calibration assembly comprises a wear acquisition hook and a top column, the wear acquisition hook is arranged on the side wall of the cover, the top column penetrates through the connecting ring, the axis of the top column is parallel to the central axis of the connecting ring, the inner end face of the top column is abutted to one end of the wear acquisition hook, and the other end of the wear acquisition hook is abutted to a pressing sheet of the wear automatic compensation mechanism.

Preferably, the limiting structure comprises a plurality of arc-shaped inclined table surfaces arranged on the outer circular surface of the main pressure plate, the inner end surface of the adjusting ring is provided with an arc-shaped inclined surface matched with the arc-shaped inclined table surfaces, and the outer circular surface of the arc-shaped inclined table surfaces is in coaxial clearance fit with the inner circular surface of the adjusting ring.

Preferably, the automatic wear compensation mechanism comprises a tooth block, an arc-shaped tooth piece, a pressing piece and a steering assembly for controlling the unidirectional rotation of the adjusting ring, the tooth block is embedded on the outer end face of the main pressure plate, the inner side end face of the arc-shaped tooth piece is provided with a tooth form meshed with the tooth block, and the arc-shaped tooth piece is pressed on the tooth block through the pressing piece; the arc-shaped tooth piece is sheet-shaped and is radially arranged in the mounting groove on the outer end face of the main pressure plate, one end of the arc-shaped tooth piece is provided with a hook connected with a small tension spring of the tension spring assembly, the rear part of the hook is a wedge-shaped inclined plane, the tail part of the wedge-shaped inclined plane is provided with a limiting step, and the arc length between the limiting step and the hook is consistent with the adjusting rotation radian of the adjusting ring; one end of the pressing piece is pressed on the wedge-shaped inclined plane of the arc-shaped tooth piece, the tail end of the pressing piece extends through the side wall of the mounting groove and then is abutted to the other end of the abrasion collecting hook, and the other end of the pressing piece is fixedly connected to the main pressure plate through a fixing screw.

Preferably, the steering assembly comprises a pawl and a one-way ratchet piece, one end of the pawl is fixed on the inner side surface of the adjusting ring, the one-way ratchet piece is fixed on the outer end surface of the main pressure plate, and the free end of the pawl is bent towards the one-way ratchet piece and meshed with the ratchet of the one-way ratchet piece.

Preferably, the tension spring assembly comprises a large tension spring and a small tension spring, one end of the large tension spring is connected with the main pressure plate through a large tension spring pin, the large tension spring is connected with the adjusting ring and the small tension spring through a connecting hook, one end of the connecting hook is connected with the large tension spring, and the other end of the connecting hook is connected with the adjusting ring; the adjusting ring drives the pawl to rotate together under the action of the tension spring assembly, and the pawl rotates along the one-way ratchet piece in a one-way mode; the other end of the small tension spring is connected with one end of an arc-shaped tooth sheet of the abrasion automatic compensation mechanism.

Preferably, the torque transmission assembly comprises a plurality of groups of transmission pieces arranged in pairs, two transmission pieces in each group are arranged in parallel, a first set of transmission pieces is arranged between the main pressure plate and the cover, and a second set of transmission pieces is arranged between the middle pressure plate and the connecting ring; the edges of the main pressure plate and the middle pressure plate are provided with lugs for connecting with the transmission sheet; the multiple groups of transmission sheets are uniformly distributed along the periphery of the cover and the connecting ring.

Preferably, the first set of transmission piece is sleeved with a transmission piece clamping plate, an inner groove for containing the transmission piece is formed in the transmission piece clamping plate, and the transmission piece is in clearance fit with the transmission piece clamping plate; the middle part of transmission piece splint and the terminal butt of regulating block, on the other end of regulating block was fixed in the outer wall of middle pressure disk, a plurality of regulating blocks through the equipartition setting made outer driven plate and interior driven plate obtain equal free gap.

Preferably, the connecting assembly comprises a claw-shaped support ring, a positioning buckle and a pre-tightening piece, the claw-shaped support ring is superposed with the central axis of the diaphragm spring, a through hole for a plurality of claws on the inner side of the claw-shaped support ring to pass through is formed in the end face of the inner side of the cover, a separation finger of the diaphragm spring passes through a gap between every two adjacent claws of the claw-shaped support ring, an elliptical hole matched with the claws is formed in the diaphragm spring, a plurality of claws with mounting holes are formed in the middle of the plurality of claws of the claw-shaped support ring at intervals, the positioning buckle is matched with the mounting holes, and the positioning buckle is radially arranged in the elliptical hole of the diaphragm spring; the pre-tightening piece is a plurality of arc-shaped pieces which are uniformly distributed at intervals, and the pre-tightening piece is arranged between the clamping jaw and the outer surface of the cover.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the single-plate clutch is changed into the double-plate clutch, the torque transmission assembly can be used for remarkably increasing the torque transmission capacity, and the phenomena of vehicle shaking, slipping and the like caused by insufficient torque transmission capacity are avoided; the inner driven plate is arranged between the main pressure plate and the middle pressure plate, the heat capacity of the clutch is increased by utilizing the two pressure plates, the heat dissipation capacity is improved, the separation and combination functions of the clutch are normal under various working conditions, the allowable abrasion thickness of the two driven plates is doubled compared with that of the original driven plate, and the service life of the clutch is prolonged; the automatic wear compensation mechanism can ensure that the distance between the separation finger end of the clutch diaphragm spring and the engine flywheel is always constant in the use process, so as to ensure that the positions of the separation finger end of the clutch diaphragm spring and the action surface of a separation bearing on the clutch actuator are always kept the same as those in the initial installation state, the defect of inaccurate clutch position control is overcome, the corresponding control speed of the AMT system is convenient to improve, the clutching and gear selecting and shifting are stable and quick, the working pressing force is basically constant because the position of the diaphragm spring is constant, and the transmission torque of the clutch is relatively accurate and unchanged.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a front view of an AMT vehicle-specific self-adjusting clutch provided in accordance with an embodiment of the present invention;

FIG. 2 is a front view of the AMT automotive dedicated self-adjusting clutch of FIG. 1 with a partial diaphragm spring broken away;

FIG. 3 is a partial sectional view A-A of FIG. 2;

FIG. 4 is a view in the direction B of the wear capture hook of FIG. 2;

FIG. 5 is a view of the torque transmitting assembly of FIG. 2 in the direction of C;

FIG. 6 is a semi-sectional view of an AMT vehicle-specific self-adjusting clutch provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural view of the main platen of FIG. 2;

FIG. 8 is a schematic view of the D-direction engagement of the main pressure plate and the adjusting ring of FIG. 7;

FIG. 9 is an enlarged view of a portion of FIG. 8 at F;

FIG. 10 is a side view of the main platen of FIG. 8;

FIG. 11 is a perspective view of the adjustment ring of FIG. 8;

FIG. 12 is a perspective view of an AMT vehicle-specific self-adjusting clutch provided in accordance with an embodiment of the present invention;

FIG. 13 is an exploded schematic view of an AMT vehicle-specific self-adjusting clutch provided in accordance with an embodiment of the present invention;

FIG. 14 is an enlarged view of a portion of FIG. 2 at I;

FIG. 15 is an enlarged view of a portion of FIG. 2 at G;

fig. 16 is a partial enlarged view at E in fig. 6;

FIG. 17 is an enlarged view of a portion of FIG. 6 at H;

FIG. 18 is a perspective view of the arcuate blade of FIG. 2;

in the figure: 1. cover, 2, diaphragm spring, 3, pre-tightening sheet, 4, claw-shaped support ring, 40, convex tongue, 41 and oval hole; 5. the device comprises a positioning buckle 6, a wear acquisition hook 7, a top column 8, a limit screw 9, a main pressure plate 10, a tooth block 11, a connecting ring 12, an intermediate pressure plate 13, an adjusting ring 130 and an arc-shaped inclined plane; 14. the elastic bolt comprises a one-way ratchet piece, 15, a positioning pin, 16, a pawl, 17, a hollow rivet, 18, a large tension spring, 19, a protective edge, 20, a silicone tube, 21, a large tension spring pin, 22, a connecting hook, 23, a small tension spring, 24, a pressing piece, 25, a fixing screw, 26, an arc-shaped tooth piece, 260, a bent hook, 261, a wedge-shaped inclined plane, 262, a limiting step and 263-a convex block; 27. cover rivet, 28, drive strap, 29, drive strap clamp, 30, locking strap, 31, connecting screw, 32, washer, 33, pressure plate rivet, 34, intermediate disk rivet, 35, adjusting block, 36, washer, 37, fixing screw, 38, outer driven disk, 39, inner driven disk, 41, lug.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, 2, 6, 12 and 13, the self-adjusting clutch special for the AMT comprises a diaphragm spring 2, a main pressure plate 9, an inner driven plate 39, an intermediate pressure plate 12 and an outer driven plate 38 which are coaxially arranged in sequence, wherein friction plates are arranged on the inner side and the outer side of the outer driven plate 38 and the inner driven plate 39, and the outer driven plate 38 and the inner driven plate 39 can relatively move along a central spline shaft; the outer driven disc 38 is adjacent to the engine flywheel and is attached to the flywheel plane, and the diaphragm spring 2 is adjacent to the transmission; the diaphragm spring 2, the main pressure plate 9, the inner driven plate 39, the middle pressure plate 12 and the outer driven plate 38 are all arranged in a shell, the shell can be connected with an engine flywheel, and torque transmission assemblies connected with the main pressure plate 9 and the middle pressure plate are arranged on the periphery of the shell and used for transmitting torque borne by the shell to the main pressure plate 9 and the middle pressure plate 12; the diaphragm spring 2 is connected with the shell through a connecting assembly, a plurality of separating finger ends of the diaphragm spring 2 are radially and uniformly distributed, the inner side surface of the large end of the disc area of the diaphragm spring 2 is abutted against the circular outer end surface of the adjusting ring 13, and the connecting assembly is arranged on the inner side of the adjusting ring 13 and used for providing a self-adjusting fulcrum for the diaphragm spring 2; the adjusting ring 13 is sleeved outside the main pressure plate 9, and a limiting structure matched with the inner end face of the adjusting ring 13 is arranged on the outer circular face of the main pressure plate 9; the adjusting ring 13 is connected with the main pressure plate 9 through a tension spring assembly, and an abrasion automatic compensation mechanism is arranged between the adjusting ring 13 and the main pressure plate 9. In the embodiment, the cover, the diaphragm spring, the main pressure plate, the inner driven plate, the middle pressure plate and the outer driven plate are coaxially arranged and are coaxial with the input shaft of the AMT; the diaphragm spring is provided with 24 separating fingers, the large end of the disc area of the diaphragm spring faces to the flywheel surface, and the ends of the 24 separating fingers face to the gearbox.

In order to facilitate processing and assembly, the shell comprises a cover 1 and a connecting ring 11, the connecting ring 11 is correspondingly arranged on one side of an external driven disc 38, the matching surface of the cover 1 and the connecting ring 11 is coaxially clamped and matched, the excircle of the bottom end of the cover 1 is coaxially assembled with the spigot of the upper end of the connecting ring 11, the cover 1 and the connecting ring 11 are fixedly connected through a connecting screw 31, and as shown in fig. 3 and 6, the other surface of the connecting ring 11 is coaxially clamped and matched with the flywheel surface; a thickness calibration component for calibrating the total thickness of the main pressure plate 9, the inner driven plate 39, the middle pressure plate 12 and the outer driven plate 38 is arranged on the side wall of the cover 1; the torque transmission components are respectively and uniformly distributed between the cover 1 and the main pressure plate 9 and between the support ring 11 and the middle pressure plate 12. In this embodiment, 11 circumference of clamping ring sets up the mounting hole that corresponds with lid 1, and 12 mounting holes, three hole interval 15 are a set of, four group equipartitions, and clamping ring 11 still sets up four equipartition connecting holes, and lid 1 bottom excircle is impressed with 11 top end tang cooperations of clamping ring to both ends face zero clearance pastes tightly, and four equipartition connecting holes that set up on lid 1 are connected the fastening by four connecting screw 31 after four equipartition connecting holes one-to-one with the four equipartition connecting holes that the clamping ring set up. The scheme adopts two pressure plates, and compared with the traditional AMT heavy truck clutch, the AMT heavy truck clutch has one more driven plate, one middle pressure plate and one connecting ring, so that the heat capacity of the clutch is increased, the heat dissipation capacity is improved, and the separation and combination functions of the clutch are normal under various working conditions; two driven discs are designed, the allowable abrasion thickness of one driven disc is doubled compared with the prior driven disc, and the service life is prolonged. Meanwhile, the friction plate abrasion automatic compensation mechanisms of the two driven plates, the friction working surfaces of the friction plates are 2 x 4 surfaces, when a certain abrasion loss occurs to the 4 friction plates, the abrasion thickness value can be dynamically collected through the abrasion automatic compensation mechanisms, the initial position of the diaphragm spring is timely recovered, the distance between the separation finger end of the clutch diaphragm spring and an engine flywheel can be guaranteed to be always kept unchanged in the use process, the position of the separation finger end of the clutch diaphragm spring and the position of the separation bearing acting surface driven by the clutch actuator are guaranteed to be always kept the same as the position of the initial installation state, the defect of inaccurate clutch position control is overcome, the corresponding speed of AMT system control is conveniently improved, and the clutch and gear shifting are stable and quick.

As a preferred structure, as shown in fig. 1, 2, 6, 12, 13, 15, and 16, the connecting assembly includes a claw-shaped support ring 4, a positioning buckle 5, and a pre-tightening piece 3, the claw-shaped support ring 4 coincides with a central axis of the diaphragm spring 2, a through hole for passing through a plurality of claws inside the claw-shaped support ring 4 is provided on an inner end surface of the cover 1, a gap between every two adjacent claws of the claw-shaped support ring 4 is for passing through a separation finger root of the diaphragm spring 2, an elliptical hole 41 matched with the claws is provided on the diaphragm spring 2, a plurality of claws are provided at intervals between the plurality of claws of the claw-shaped support ring 4 and have mounting holes, the positioning buckle 5 is matched with the mounting holes, and the positioning buckle 5 is radially disposed in the elliptical hole 41 of the diaphragm spring 2; the pre-tightening piece 3 is a plurality of arc-shaped pieces which are uniformly distributed at intervals, and the pre-tightening piece 3 is arranged between the clamping jaw and the outer surface of the cover 1. One end of the positioning buckle is provided with a limiting table, and the other end of the positioning buckle is provided with an axial opening which can be clamped in the mounting hole of the clamping jaw; the end of each jaw 40 is provided with a tongue 40 parallel to the outer surface of lid 1, and the large end of the outer surface of diaphragm spring 2 abuts against a rib on the inner surface of lid 1, so that the diaphragm spring is stable in operation. In this embodiment, the cap 1, the diaphragm spring 2, and the claw ring 4 are coaxially positioned as follows:

the front tips of 6 positioning buckles 5 correspondingly penetrate 6 claw convex tongues with mounting holes of a claw-shaped support ring 4, then 6 positioning buckles 5 are embedded into 6 elliptical holes of a diaphragm spring 2, the large end of the diaphragm spring 2 and 4 inner sides of a cover 1 form an annular convex rib to lean against, 24 claws of the claw-shaped support ring 4 are stringed out of 24 elliptical holes of the diaphragm spring 2, 24 flat through holes of the cover and 6 pre-tightening piece 3 flat holes arranged on the periphery of the edge end face of the cover, and then 24 claws of the claw-shaped support ring 4 are subjected to clearance elimination and bending riveting together through the pre-tightening pieces.

The diaphragm spring 2 has a lever driving effect of providing a clutch working pressing force and clutch separation combination, and the disc-shaped large end area of the diaphragm spring 2 respectively and coaxially abuts against an annular convex rib on the inner side of the cover 1 and an arc end surface of an adjusting ring 13 supported on the main pressure plate 9 to provide the working pressing force; 24 separation finger ends of the diaphragm spring are used as lever drive, the support of the diaphragm spring takes a convex cambered surface of a claw-shaped support ring 4 as an annular lever support and moves in the direction of the axis of the clutch cover, and the 24 separation finger rings are uniformly distributed around the axis, so that the stress is more uniform, and the separation and combination of the clutch are more facilitated; meanwhile, the circumferential edge of the concave area of the diaphragm spring and the arc edge of the concave area of the root of each separation finger are designed into small round corners, so that the stress is smaller, and the clutch is durable and has long service life.

In a specific embodiment of the present invention, as shown in fig. 1, 4, 6, and 17, the thickness calibration assembly includes a wear acquisition hook 6 and a support pillar 7, the wear acquisition hook 6 is disposed at a notch on a side wall of the cap 1, the support pillar 7 is disposed through the connection ring 11, an axis of the support pillar 7 is parallel to a central axis of the connection ring 11, an inner end surface of the support pillar 7 abuts against one end of the wear acquisition hook 6, and the other end of the wear acquisition hook 6 abuts against a pressing piece 24 of the wear automatic compensation mechanism. The limit screw 8 is used for stringing long round holes on the abrasion acquisition hook 6 to fasten the abrasion acquisition hook 6 at the opening at the edge of the cover 1, and the abrasion acquisition hook 6 can move relative to the cover 1; after the excircle at the bottom end of the cover 1 is coaxially assembled with the seam allowance at the upper end of the connecting ring 11, the folded edge at one end of the abrasion acquisition hook 6 is abutted against the top column 7 on the connecting ring 11, and the plane of the acquisition hook at the other end of the abrasion acquisition hook 6 is abutted against the elbow of the pressing sheet 24, so that the relative total axial thickness of the two outer driven discs 38, the inner driven disc 39, the main pressure plate 9 and the middle pressure plate 12 in the working state can be calibrated when an engine flywheel is installed on a clutch.

In an embodiment of the present invention, as shown in fig. 2, 6, 10, and 11, the limiting structure includes a plurality of arc-shaped inclined table surfaces disposed on the outer circumferential surface of the main pressure plate 9, the inner end surface of the adjusting ring 13 is provided with an arc-shaped inclined surface 130 matched with the arc-shaped inclined table surfaces, and the outer circumferential surface of the arc-shaped inclined table surfaces is in coaxial clearance fit with the inner circumferential surface of the adjusting ring 13. In this embodiment, the outer side of the end surface of the main pressure plate 9 is provided with six arc-shaped inclined table surfaces on the circumference thereof, and the six arc-shaped inclined surfaces are in fit contact with the six arc-shaped inclined surfaces on the end surface of the adjusting ring 13. After assembly, the inner diameter of the adjusting ring is in coaxial clearance fit with the outer diameter of the side face of the main pressure plate, and the arc-shaped inclined plane of the inner end face of the adjusting ring is attached to the arc-shaped inclined table face on the main pressure plate and can rotate relatively.

In one embodiment of the present invention, as shown in fig. 2, 6, 7, 8, and 9, the automatic wear compensation mechanism includes a tooth block 10, an arc-shaped tooth piece 26, a pressing piece 24, and a steering assembly for controlling the unidirectional rotation of the adjusting ring 13, the tooth block 10 is embedded on the outer end surface of the main pressure plate 9, the inner end surface of the arc-shaped tooth piece 26 is provided with a tooth form engaged with the tooth block 10, and the arc-shaped tooth piece 26 is pressed on the tooth block 10 through the pressing piece 24; the arc-shaped tooth piece 26 is sheet-shaped and is radially arranged in the mounting groove on the outer end face of the main pressure plate 9, one end of the arc-shaped tooth piece 26 is provided with a hook 260 connected with the small tension spring 23 of the tension spring assembly, and the other side of the hook is provided with a convex block 263 which extends and penetrates through the side wall of the main pressure plate, so that the arc-shaped tooth piece is ensured to be stably mounted; the rear part of the hook 260 is a wedge-shaped inclined surface 261, the tail part of the wedge-shaped inclined surface 261 is provided with a limiting step 262, and the arc length between the limiting step 262 and the hook 260 is consistent with the adjusting rotation radian of the adjusting ring 13; one end of the pressing piece 24 is pressed against the wedge-shaped inclined surface 261 of the arc-shaped tooth piece 26, the tail end of the pressing piece extends through the side wall of the installation groove and then is abutted against the other end of the abrasion acquisition hook 6, and the other end of the pressing piece 24 is fixedly connected to the main pressure plate 9 through a fixing screw 25. As shown in fig. 14, the steering assembly comprises a pawl 16 and a one-way ratchet piece 14, one end of the pawl 16 fixes the inner side surface of the adjusting ring 13, the one-way ratchet piece 14 is fixed on the outer end surface of the main pressure plate 9, and the free end of the pawl 16 is bent towards the one-way ratchet piece 14 and is meshed with the ratchet of the one-way ratchet piece 14; the tension spring assembly comprises a large tension spring 18 and a small tension spring 23, one end of the large tension spring 18 is connected with the main pressure plate 9 through a large tension spring pin 21, the large tension spring 18 is connected with the adjusting ring 13 and the small tension spring 23 through a connecting hook 22, one end of the connecting hook 22 is connected with the large tension spring 18, and the other end of the connecting hook 22 is connected with the adjusting ring 13; the adjusting ring 13 drives the pawl 16 to rotate together under the action of the tension spring assembly, and the pawl 16 rotates along the one-way ratchet piece 14 in one way; the other end of the small tension spring 23 is connected with one end of the arc-shaped tooth piece 26. In this embodiment, the assembly process of the wear automatic compensation mechanism is as follows:

two small holes on the side surface of the adjusting ring 13 are connected with a pawl 16 through two hollow rivets 17, the pawl 16 is meshed with ratchet teeth on a one-way ratchet piece 14, and the one-way ratchet piece 14 is fixed on the main pressure plate 9 through two positioning pins 15, so that the adjusting ring 13 can only rotate clockwise but not anticlockwise relative to the main pressure plate 9 along the axial direction towards the flywheel surface. The circular end face of the adjusting ring 13 is supported at the large end of the diaphragm spring along the axis, one end of the connecting hook 22 is connected with the large tension spring 18, the tip part of the other end of the connecting hook is connected with the small hole in the side face of the adjusting ring 13, and the tip part of the connecting hook 22 is provided with a downward bent arc part for connecting the small tension spring 23; the other end of the small tension spring 23 is connected with a small hook 260 at the front end of the arc-shaped tooth piece 26, the arc-shaped tooth piece 26 is attached to the outer end face of the edge of the main pressure plate 9, a plurality of small teeth are arranged at the lower end of the arc-shaped tooth piece 26 and can be meshed with a tooth block 10 embedded in the end face of the main pressure plate 9 in a pressing mode, the wedge-shaped inclined surface 261 of the arc-shaped tooth piece 26 is pressed by the rear end of an elbow of the pressing piece 24, the tail of the pressing piece 24 is fixedly connected into a groove at the edge of the end face of the main pressure plate 9 through a fixing screw 25, the front end of the elbow of the pressing piece 24 is pressed at the front end of the elbow of the abrasion acquisition hook 6, and the arc length from a limiting step 262 at the tail of the arc-shaped tooth piece 26 to the rear end of the elbow of the pressing piece 24 is equal to the rotation adjustment compensation range of the adjusting ring 13; the other end of the large tension spring 18 is provided with two connecting rings, one of the connecting rings is pulled to be sleeved on the large tension spring pin 21, the large tension spring 18 is sleeved with the silicone tube 20, the outer side of the silicone tube 20 is provided with a protective edge 19, the protective edge 19 has elasticity, the outer side of the protective edge is tightly attached to the inner side face of the circular groove at the rear end of the main pressure plate 9, and the large tension spring is prevented dust by means of the silicone tube and the protective edge, so that the protective effect is achieved.

In one embodiment of the utility model, as shown in fig. 5, 12 and 13, the torque transmission assembly comprises a plurality of sets of transmission straps 28 arranged in pairs, two transmission straps 28 of each set being arranged side by side, a first set of transmission straps 28 being arranged between the main pressure plate 9 and the cover 1, and a second set of transmission straps 28 being arranged between the intermediate pressure plate 12 and the connecting ring 11; the edges of the main pressure plate 9 and the middle pressure plate 12 are provided with lugs 41 used for being connected with the transmission sheet 28; the multiple sets of transmission sheets 28 are uniformly distributed along the periphery of the cover 1 and the connecting ring 11. In the embodiment, four sets of transmission pieces 28 are uniformly distributed on the peripheral edges of the cover 1 and the connecting ring 11, one end of the right transmission piece 28 is fixedly connected with a lug 41 of the main pressure plate through a gasket 32 and a pressure plate rivet 33, and the other end of the right transmission piece 28 is fixedly connected with the cover 1 through a locking piece 30 and a transmission piece rivet 34; one end of the left driving strap 28 is connected and fixed with the lug of the middle pressure plate 12 through a washer 32 and a driving strap rivet 34, and the other end is connected and fixed with the connecting ring 11 through a locking strap and a screw. Here, the locking piece and the washer play a role in loosening and cushioning the driving piece 28, and the two ends of the driving piece are not limited to be installed by using screws and rivets, the washer and the locking piece, and other connecting pieces can be used for connection. The torque transfer capacity of the clutch can be increased by four sets of drive plates.

Further optimizing the technical scheme, as shown in fig. 5, 12 and 13, a first set of transmission straps 28 are sleeved with transmission strap clamping plates 29, inner grooves for accommodating the transmission straps 28 are formed in the transmission strap clamping plates 29, and the transmission straps 28 and the transmission strap clamping plates 29 are in clearance fit; the middle part of the transmission piece clamping plate 29 is abutted against the tail end of the adjusting block 35, the other end of the adjusting block 35 is fixed in a groove in the outer edge of the middle pressure plate 12, and the outer driven plate 38 and the inner driven plate 39 obtain equal free gaps when being separated through the plurality of adjusting blocks 35 which are uniformly distributed. In this embodiment, a groove is formed on one side of four lugs uniformly distributed around the middle pressure plate 12, and the adjusting block 35 is fastened at the groove by screws. In particular, during installation, the adjustment block 35 is fixed to the intermediate pressure plate 12 by an adjustment block washer 36 and an adjustment block fixing screw 37. Can make main pressure disk and middle pressure disk obtain equal free clearance at clutch separation in-process through the regulating block, utilize the transmission piece splint to play the guard action to the transmission piece simultaneously, avoid the frequent wearing and tearing and the deformation that lead to with the transmission piece contact of regulating block.

The working process of the utility model is as follows:

in work, the AMT automobile special self-adjusting clutch provided by the utility model is in a normally combined torque transmission state, and the torque of an engine is transmitted to an input shaft of a gearbox through the clutch;

during the separation process, the separation finger end of the diaphragm spring 2 is pushed along the axis towards the flywheel direction, the large end of the disc area of the diaphragm spring 2 releases the pressing force on the adjusting ring 13 and the main pressure plate 9, the adjusting ring 13 and the main pressure plate 9 are unloaded, and the main pressure plate 9 moves along the axis towards the gearbox direction under the action of the resilience force of the four groups of transmission sheets 28 connected to the four lugs of the cover 1 and the main pressure plate 9, for example:

assuming that the back displacement of the main pressure plate 9 is 1, the inner driven plate 39 moves backwards, and the intermediate pressure plate 12 also moves towards the direction of the gearbox under the action of the resilient force of the four sets of transmission straps 28 connected to the four lugs of the connecting ring 11 and the intermediate pressure plate, because the four adjusting blocks 35 fixed at the four grooves uniformly distributed around the intermediate pressure plate 12 abut against the middle positions of the corresponding transmission strap 29, and the back displacement distance of the intermediate pressure plate 12 is 1/2 of the main pressure plate 9, the gap between the main pressure plate 9 and the intermediate pressure plate 12 is 1-1/2-1/2, and the free gaps obtained by the inner driven plate 39 and the outer driven plate 38 are always equal. At this time, the outer driven disk 38 is disengaged from the engine flywheel surface with the backward movement, and the engine power is not transmitted, thereby completing the complete separation function.

During the engagement process, the main pressure plate 9 moves along the axis in the direction of the engine flywheel, and then the inner driven plate 39, the intermediate pressure plate 12 and the outer driven plate 39 move in the direction of the engine flywheel until the engagement is completed. When the friction plates of the outer driven plate 38 and the inner driven plate 39 are not abraded during the process of transmitting the torque, the abrasion automatic adjusting and compensating mechanism does not perform compensation adjustment. When the friction plates of the outer driven plate 38 and the inner driven plate 39 are worn during the process of combining and transmitting the torque, the main pressure plate 9 and the intermediate pressure plate 12 move towards the flywheel surface along the axis, and the moving distance is the total wear thickness of the friction plates.

Because the front end of the elbow of the pressing piece 24 fixed on the main pressure plate 9 is always pressed on the head measuring part of the abrasion acquisition hook 6, and the distance of the abrasion acquisition hook 6 relative to the flywheel surface is a fixed value, when the pressing piece 24 moves along the axis along the main pressure plate 9 to the flywheel surface, the back end of the elbow of the pressing piece 24 and the arc inclined plane at the upper end of the arc-shaped tooth piece 26 generate a gap. When the clutch is separated, the large end of the diaphragm spring 2 releases the pressing force applied to the adjusting ring 13 and the main pressure plate 9, the adjusting ring 13 and the arc-shaped tooth sheet 26 respectively rotate clockwise and slightly by an angle relative to the main pressure plate 9 along the axial direction towards the flywheel surface under the action of the tension of the large tension spring 21 and the small tension spring, a plurality of small teeth at the lower end of the arc-shaped tooth sheet 26 are meshed after relatively moving by a tooth pitch relative to the teeth of the tooth block 10 embedded on the rear end surface of the main pressure plate 9, namely, the gap between the elbow rear end of the pressing sheet 24 and the arc-shaped inclined surface at the upper end of the arc-shaped tooth sheet 26 is eliminated, and one-time compensation is completed. When the clutch is reunited, the diaphragm spring 2 is restored to the initial position, and the abrasion adjustment compensation is always realized in the dynamic process from the clutch separation to the clutch reunion.

In conclusion, the utility model has the following beneficial effects:

1. the utility model can ensure that the working position of the diaphragm spring 2 and the distance between the separation finger end and the flywheel working surface are kept unchanged, the axial size is not increased, and the working position of the diaphragm spring 2 and the distance between the separation finger end and the flywheel working surface are increased along with the abrasion of the friction plate after the friction plate of the ordinary push-type clutch is abraded, so that the axial size is increased.

2. The utility model can keep the diaphragm spring 2 at the initial installation position in the whole using process, thereby ensuring that the working pressing force of the clutch is not changed, solving the difficulty of pneumatic control of the heavy AMT clutch, and ensuring the position control precision of the clutch and the stability of the torque transmission of the clutch.

3. The diaphragm spring 2 in the utility model keeps the initial installation position in the whole service life, namely the working pressing force of the clutch is not changed after the friction plate is worn, so the thickness design of the friction plate can be increased, the service life is prolonged, and the service life can reach more than three times of that of the common clutch.

4. In the utility model, the diaphragm spring 2 is kept at the initial installation position in the whole service life, namely the working pressing force of the clutch is not changed after the friction plate is worn, so the separating force is not changed, and the advantage is very good compared with the advantage that the separating force needs to be increased after the common diaphragm spring clutch is worn, so that the stress of the clutch control mechanism is relatively small, and the rigidity is easy to ensure.

5. The automatic abrasion adjusting mechanism is simple and reliable in structure, few in added parts and convenient to control cost;

6. the double pressure discs absorb working heat simultaneously, so that the heat dissipation performance of the double pressure discs is obviously superior to that of a single-disc clutch, the thermal friction loss of the clutch is reduced, and the service life of the double pressure discs is longer.

In a word, the AMT automobile special self-adjusting clutch provided by the utility model obviously improves the capability of transmitting the torque of an engine or the torque of a motor on the premise of controlling the axial dimension to be unchanged and not increasing the radial dimension, improves the reliability and the service life of a high-power AMT commercial vehicle, and has good application prospect.

Claims (10)

1. The utility model provides a special self-interacting clutch of AMT car which characterized in that: the clutch comprises a diaphragm spring, a main pressure plate, an inner driven plate, a middle pressure plate and an outer driven plate which are coaxially arranged in sequence, wherein friction plates are arranged on the inner side and the outer side of each of the outer driven plate and the inner driven plate, the outer driven plate is adjacent to an engine flywheel, and the diaphragm spring is adjacent to a transmission; the diaphragm spring, the main pressure plate, the inner driven plate, the middle pressure plate and the outer driven plate are all arranged in the shell, and the periphery of the shell is provided with a torque transmission assembly connected with the main pressure plate and the middle pressure plate and used for transmitting the torque borne by the shell to the main pressure plate and the middle pressure plate;

the diaphragm spring is connected with the shell through a connecting assembly, a plurality of separating finger ends of the diaphragm spring are radially and uniformly distributed, the inner side surface of the large end of the disc area of the diaphragm spring is abutted against the circular outer end surface of the adjusting ring, and the connecting assembly is arranged on the inner side of the adjusting ring and used for providing a self-adjusting fulcrum for the diaphragm spring;

the adjusting ring is sleeved outside the main pressure plate, and a limiting structure matched with the inner end surface of the adjusting ring is arranged on the outer circular surface of the main pressure plate; the adjusting ring is connected with the main pressure plate through a tension spring assembly, and an abrasion automatic compensation mechanism is arranged between the adjusting ring and the main pressure plate.

2. The AMT vehicle-specific self-adjusting clutch according to claim 1, wherein: the shell comprises a cover and a connecting ring, the connecting ring is correspondingly arranged on one side of the outer driven disc, the cover is in clamping fit with the matching surface of the connecting ring, the cover and the connecting ring are fixedly connected through a connecting screw, and the other side of the connecting ring is in coaxial clamping fit with the surface of the flywheel; a thickness calibration component for calibrating the total thickness of the main pressure plate, the inner driven plate, the middle pressure plate and the outer driven plate is arranged on the side wall of the cover; the torque transmission components are respectively and uniformly distributed between the cover and the main pressure plate and between the support ring and the middle pressure plate.

3. The AMT vehicle-specific self-adjusting clutch according to claim 2, wherein: the thickness calibration assembly comprises a wear acquisition hook and a top column, the wear acquisition hook is arranged on the side wall of the cover, the top column penetrates through the connecting ring, the axis of the top column is parallel to the central axis of the connecting ring, the inner end face of the top column is abutted against one end of the wear acquisition hook, and the other end of the wear acquisition hook is abutted against a pressing sheet of the wear automatic compensation mechanism.

4. The AMT vehicle-specific self-adjusting clutch according to claim 2, wherein: the limiting structure comprises a plurality of arc inclined table surfaces arranged on the outer circular surface of the main pressure plate, arc inclined surfaces matched with the arc inclined table surfaces are arranged on the inner end surface of the adjusting ring, and the outer circular surface of each arc inclined table surface is in coaxial clearance fit with the inner circular surface of the adjusting ring.

5. The AMT vehicular-specific self-adjusting clutch according to claim 3, wherein: the automatic abrasion compensation mechanism comprises a tooth block, an arc-shaped tooth piece, a pressing piece and a steering assembly for controlling the unidirectional rotation of the adjusting ring, wherein the tooth block is embedded on the outer end face of the main pressure plate, the inner side end face of the arc-shaped tooth piece is provided with a tooth form meshed with the tooth block, and the arc-shaped tooth piece is pressed on the tooth block through the pressing piece; the arc-shaped tooth piece is sheet-shaped and is radially arranged in the mounting groove on the outer end face of the main pressure plate, one end of the arc-shaped tooth piece is provided with a hook connected with a small tension spring of the tension spring assembly, the rear part of the hook is a wedge-shaped inclined plane, the tail part of the wedge-shaped inclined plane is provided with a limiting step, and the arc length between the limiting step and the hook is consistent with the adjusting rotation radian of the adjusting ring; one end of the pressing piece is pressed on the wedge-shaped inclined plane of the arc-shaped tooth piece, the tail end of the pressing piece extends through the side wall of the mounting groove and then is abutted to the other end of the abrasion collecting hook, and the other end of the pressing piece is fixedly connected to the main pressure plate through a fixing screw.

6. The AMT vehicle-specific self-adjusting clutch according to claim 5, wherein: the steering assembly comprises a pawl and a one-way ratchet piece, one end of the pawl is fixed on the inner side surface of the adjusting ring, the one-way ratchet piece is fixed on the outer end surface of the main pressure plate, and the free end of the pawl is meshed with the ratchet of the one-way ratchet piece.

7. The AMT vehicular-specific self-adjusting clutch according to claim 6, wherein: the tension spring component comprises a large tension spring and a small tension spring, one end of the large tension spring is connected with the main pressure plate through a large tension spring pin, and the large tension spring is connected with the adjusting ring and the small tension spring through a connecting hook; the adjusting ring drives the pawl to rotate together under the action of the tension spring assembly, and the pawl rotates along the one-way ratchet piece in a one-way mode; the other end of the small tension spring is connected with one end of an arc-shaped tooth sheet of the abrasion automatic compensation mechanism.

8. The AMT vehicle-specific self-adjusting clutch according to claim 2, wherein: the torque transmission assembly comprises a plurality of groups of transmission pieces which are arranged in pairs, two transmission pieces in each group are arranged in parallel, a first set of transmission pieces is arranged between the main pressure plate and the cover, and a second set of transmission pieces is arranged between the middle pressure plate and the connecting ring; the edges of the main pressure plate and the middle pressure plate are provided with lugs for connecting with the transmission sheet; the multiple groups of transmission sheets are uniformly distributed along the periphery of the cover and the connecting ring.

9. The AMT vehicular-specific self-adjusting clutch according to claim 8, wherein: the first set of transmission piece is sleeved with a transmission piece clamping plate, an inner groove for containing the transmission piece is formed in the transmission piece clamping plate, and the transmission piece is in clearance fit with the transmission piece clamping plate; the middle part of transmission piece splint and the terminal butt of regulating block, on the other end of regulating block was fixed in the outer wall of middle pressure disk, a plurality of regulating blocks through the equipartition setting made outer driven plate and interior driven plate obtain equal free gap.

10. The AMT vehicle-specific self-adjusting clutch according to any one of claims 2-9, characterized in that: the connecting assembly comprises a claw-shaped support ring, a positioning buckle and a pre-tightening piece, the claw-shaped support ring is superposed with the central axis of the diaphragm spring, through holes for a plurality of claws on the inner side of the claw-shaped support ring to pass through are formed in the end face of the inner side of the cover, separating fingers of the diaphragm spring pass through gaps between every two adjacent claws of the claw-shaped support ring, elliptical holes matched with the claws are formed in the diaphragm spring, a plurality of claws are arranged in the middle of the plurality of claws of the claw-shaped support ring at intervals and provided with mounting holes, the positioning buckle is matched with the mounting holes, and the positioning buckle is radially arranged in the elliptical holes of the diaphragm spring; the pre-tightening piece is a plurality of arc-shaped pieces which are uniformly distributed at intervals, and the pre-tightening piece is arranged between the clamping jaw and the outer surface of the cover.

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